BACKGROUND Less than optimal reproductive conditions may be associated with a secondary sex ratio biased towards females. Body weight represents a critical determinant of reproduction. Accordingly, we evaluated whether preconception body weight and weight gain during pregnancy influence the sex ratio of human offspring. METHODS A retrospective study was performed on 10 239 births in 1997-2001...

BACKGROUND As women with cystic fibrosis are living longer, pregnancy is becoming increasingly common. The combined experience of pregnancies in women with cystic fibrosis from adult centres in the Midlands and North of England has been examined. METHODS A retrospective study of the case notes of 22 pregnancies in 20 patients with cystic fibrosis examined changes in lung function, body weight...

BACKGROUND There has been no large nationwide population-based study to examine the effects of maternal smoking status during pregnancy on birth weight that simultaneously controlled for clinical information, socioeconomic status, and maternal weight. Thus, this study aimed to determine the association between maternal smoking status during pregnancy and birth weight, while taking these confoun...

Background: Previous studies have shown that meconium staining of the amniotic fluid may affect maternal and neonatal outcomes. In this study, we aimed to investigate the relationship between birth weight and meconium passage and its related factors in pregnant women.Materials and Methods: This matched case control study was conducted on a total of 200 newborns (100 as cases and 100 as controls...

The objective of this study was evaluation of excessive pregnancy weight gain effect in non-diabetic women with normal pre-pregnancy BMI on macrosomia of neonate. In a descriptive cross-sectional study, neonate weighs of all term pregnancy in non-diabetic women with normal pre-pregnancy BMI delivered from 2002 to 2004 in Shaheed Sadoughi Hospital in Yazd, were evaluated. Compared with mothers w...

The specific role of weight change in the first weeks of gestation in fetal growth has not been fully explored in humans. Our aims were to investigate: (1) the specific association between weight change in the first trimester of pregnancy (WCT1) and size at birth in term pregnancies; and (2) the role of placental weight in this relationship. From 2002 women included in the French EDEN study, 17...

The objective of this study was to assess the effects of excessive weight gain during pregnancy on the outcome of cesarean delivery. It was a cohort study comparing the outcome of cesarean delivery between 56 pregnant women with excessive weight gain during pregnancy and 75 pregnant women with no excessive weight gain during pregnancy, consecutively recruited at the Yaoundé Gyneco-Obstetric and...

BACKGROUND AND OBJECTIVES Maternal pre-pregnancy body mass index (BMI) and gestational weight gain (GWG) have been reported to be associated with pregnancy outcomes. Due to the nutrition transition in Thailand, the double burden of malnutrition is increasing and this may have negative consequences on birth outcomes. This study aimed to investigate the relationship between pre-pregnancy BMI and ...